Question

State Coulomb's law in electrostatics.

Answer 1

The force of attraction or repulsion between two point charges is.

i) directly proportional to the product of the charges and

ii) Inversely proportional to the square of the distance between them.

$F=k_e\frac{q_1{q}_2}{r^2}$

where $k_e$ is Coulomb's constant ($k_e=9\times {10}^{9}N{m}^2{C}^{-2})$, $q_1$ and $q_2$ are the signed magnitudes of the charges, and the scalar $r$ is the distance between the charges.